First solo was in a K13 at Cosford some 20 odd years ago. I remember screaming 'Yeeeeeees!' as I released the cable. Can't remember too much else about it but I obviously got down OK...
First powered solo was in a 172, bit of a non event, just another bit of the ladder to PPL. Best bit of the PPL training was the qualifying xc, felt like a real power pilot when I had done that.